property oldValue

Dart SDK

dart:html

MutationRecord

1. Static properties
2. instanceRuntimeType
3. Constructors
4. internal_
5. Properties
6. addedNodes
7. attributeName
8. attributeNamespace
9. hashCode
10. nextSibling
11. oldValue
12. previousSibling
13. removedNodes
14. runtimeType
15. target
16. type
17. Operators
18. operator ==
19. Methods
20. noSuchMethod
21. toString